Very obviously not.

Nobody substitutes random three letter strings for keywords in ordinary C code unless they intend on some trivial obfuscation.

    define O1O printf
    #define OlO putchar
    #define O10 exit
    #define Ol0 strlen
    #define QLQ fopen
    #define OlQ fgetc
    #define O1Q abs
    #define QO0 for
    typedef char lOL;

I've seen code like this (3 letter macros for every one and a half(!) syntax construct, all macros starting in Q, seemingly random indentation). I do not understand why the developer did that or why the company let him. Just that at the end he didn't understand his own code anymore and couldn't fix some issues.

Not random, but permutations of easily confusable characters (0OQ, 1l).

In many fonts, they are nearly indistinguishable. For example, the default font of putty for { and ( look identical to me, leading to many syntax errors in my code.

Did you write the program without the intention of being obfuscatory, and then _later_ submit it to IOCCC? Or did somebody else submit your code?

It's right here, and your name is on it. https://www.ioccc.org/1986/bright/bright.c

It even won an award! https://www.ioccc.org/1986/bright/hint.html

> Did you write the program without the intention of being obfuscatory

I cribbed it from system .h files.